Trap requires specific loads. No larger than 7.5 shot, no more than 1 1/8th oz. of said shot.
Your #6s could be an issue, they are dangerous at a longer range. Most clubs have a requirement that the shot falls out of the sky within a specific known distance. At my club and many others we don't allow greater than 7.5 shot. Larger sizes would be raining down on the passing cars on highway 30. If you ever graduate to ATA 7.5 is the max. shot size.
Freedom is not free